Machine Comparison
Haas ST-20 vs Haas ST-20Y
Haas Automation vs Haas Automation · CNC Lathes
Summary
The Haas ST-20 and Haas ST-20Y are both from Haas Automation's cnc lathes lineup, making this a common upgrade or lineup decision for shops already invested in the Haas Automation ecosystem. These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. Both machines are proven performers in production environments and represent solid investments for shops in the market for a cnc lathe.
Specifications Comparison
| Specification | Haas ST-20 | Haas ST-20Y |
|---|---|---|
| Max Spindle Speed | 4,000 RPM | 4,000 RPM |
| Spindle Power | 14.9 kW (20 hp) | 14.9 kW (20 hp) |
| Spindle Torque | 203 Nm (150 ft-lb) @ 500 RPM | 203 Nm (150 ft-lb) @ 500 RPM |
| Tool Capacity | 12-station BOT | 12-station BMT-65 |
| Chuck Size | 210 mm (8.3 in) | 210 mm (8.3 in) |
| Bar Capacity | 63.5 mm (2.5 in) | 63.5 mm (2.5 in) |
| Control | Haas Next Generation Control (NGC) | Haas Next Generation Control (NGC) |
| Max Swing | 533 mm (21 in) | 533 mm (21 in) |
| Max Cutting Diameter | 330 mm (13 in) ▲ | 298 mm (11.75 in) |
| Max Cutting Length | 572 mm (22.5 in) | 572 mm (22.5 in) |
| Spindle Nose | A2-6 | A2-6 |
| Spindle Bore | 88.9 mm (3.5 in) | 88.9 mm (3.5 in) |
| X Axis Travel | 213 mm (8.4 in) | 213 mm (8.4 in) |
| Z Axis Travel | 572 mm (22.5 in) | 572 mm (22.5 in) |
| Price Range | $55,000 - $85,000 ▲ | $80,000 - $110,000 |
Advantages
Haas ST-20
- Superior max cutting diameter at 330 mm (13 in) vs 298 mm (11.75 in)
- More competitive pricing at $55,000 - $85,000 compared to $80,000 - $110,000
- Backed by Haas Automation's dealer and service network for parts and support
- Job shops needing a reliable mid-size CNC turning center for general-purpose steel, stainless, and aluminum work
Haas ST-20Y
- Backed by Haas Automation's dealer and service network for parts and support
- Job shops adding Y-axis turning capability without a six-figure machine investment
Verdict
This is a close matchup. The Haas ST-20 and Haas ST-20Y trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.